Apparatus for constructing concrete floors.



N.,F. AMBURSEN. APPARATUS FOR CONSTRUCTING CONCRETE FLOORS.

APPLICATION FILED JAN- 7. I918.

Patented Dec. 31, 1918.

3 SHEETS--SHEET N? F. AMBURSEN. APPARATUS FOR CONSTBUGT-ING cowcnne FLOORS.

APPLICATION FILED JAN- 7- I918.

Patented Dec. 31 1918.

3 SHEETS-SHEET 2.

N. F. AMBURSEN. APPARATUS FOR comsrnucrms CONCRETE FLOORS.

APPLICATION FILED JAN. 7. 1918- Patented Dec. 31, 1918.

UNITED sax-arias PATENT FFICE.

NILSFREDERICK AMBTJ'RSEN, OF NEWTON HIGHLANDS, MASSACHUSETTS, ASSIGNOR TO THE UNI-FORM COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

APIBARATUS FOR CONSTRUCTING CONCRETE FLOORS.

Specification of Letters Patent.

Patented Dec. 31, 1918.

Application filed January 7, 1918. Serial No. 210,605.

To aZZ whom it may concern:

Be it known that I, NILs Fnnnmuon. AM- BURSEN, a citizen of the United States, and a resident of Newton Highlands, in the county of Middlesex and State of Massachusetts, have invented a new and useful Improvementin Apparatus for Constructing Concrete Floors, of wvhich the following is a specification.

In the construction of reinforced concrete Iioors by means of forms such as described in my application Serial No. 189,447 filed September 4, 1917 it is necessary to arrange said forms so that the end beam boxes of a panel are over the supporting columns. As the columns are arbitrarily placed it is essential that means he provided for adjust ably spacing the several forms making up a panel in order that forms of standard size may be employed. For example, the size of the building may require that the columns 'be placed 22 feet between centers in which case the f rms if square would have to be 2.2 feet on a side it ten of them were employed to bridge the space between a pair of columns. This particular construction would therefore require a form of special size, and in fact it may be said, generally speaking, that no two constructions would require forms of the same size. in order to overcome this limitation and use standard formswhich preferably are 2 feet square at their lower edges I arrange matters so that' the forms may be spaced apart and the difference between the separation of the columns and the combined length of the number of forms necessary to make up the panel may be taken up by such spacing. For instance, if the distance between the centers of a pair of columns is 22 feetand the forms are 2 feet on a side at their lower edges, ten terms will he used to a side of a panel and the difference between the separation of the columns and the combined length at ten forms, viz., 2 feet will be taken up by spacing each form about .2 foot from its adjacent form.

To this end my invention comprises laterally-spaced concrete-form support-members, preferably inverted channel-irons, and dome-shaped sheet-metal concrete forms which span the space between each pair of support-incmbers nd have the lower edges of two opposite sides resting thereon, to

gether with means for adjustably spacing the forms. The lower edges of the domes extend horizontally outwardly and terminate 1n downturned lips, the spacing means preferably being placed between the downturned lips of each pair of adjacent forms. F1llers such as metallic plates are placed on the horizontal outward extensions of the lower edges of each adjacent pair of domes to bridge the gaps between the latter and preferably means are employed for clamplng said fillers to said extensions. The fillers and the sides of each pair of adjacent domes form the longitudinal and transverse beann boxes so that the floor beams may be reduced in depth without weakening the molded structure thereby effecting a saving in the material required to make a floor of given strength.

My invention further comprises the parts and combinations of parts set forth in the appended claims.

Illustrative embodiments of my invention are shown in the drawings which accompany and form a part of this specification where in,

Figure l is a transverse section taken on the line l-l of Fig. 2 of an apparatus for constructing concrete floors embodying one form of my invention. Fig. 2 is a longitudinal section taken on the line 2-2 of Fig. 1. Fig. 3 is a plan view of one type of concrete-form support-member. Fig. 4 is a plan view of my improved apparatus before the concrete has been poured. Fig. 5 is atransverse section of a modification. Fig. 6 is a transverse section of a concrcteform supportqnember showing a modified spacer.

' Fig. 7 is a section taken on the line 77 of Fig. 8 and showing in plan. view the spacer illustrated in Fig. 6. Fig. 8 is a transverse section illustrating the use of the spacer shown in Figs. 6 and 7. Fig. 9 is a transverse section of another form of spacer that may be employed. Fig. 10 is a plan view showing still another modification. Fig. 11 is an elevation of the spacing device shown in Fig. 10. Fig. 12 is a plan view of another spacing device, and Fig. 13 is an elevation of the spacer shown in Fig. 12.

In the drawings which I have selected to illustrate the principle of my invention 1 represents one of a number of stringers which are supported upon the posts 2 at course that in lieu of the support-members illustrated in the drawings I may use ordinary channel-irons such as shown in my application above referred to, said channels being placed with their flanges on the stringers. The support-members are apertured at suitable intervals as shown at 6, 6 to receive bolts and preferably they are provided with upstanding lugs 7, '4' which may be formed by punching as shown in Fig. 3, said lugs preventing the lower edges of the domes from sliding off the support-members before the mold is completed.

Bridging the spaces between each adjacent pair of channels are domes 8, all four sides of which are formed with outwardly exending horizontal portions 9 which terminate in downturned lips or flanges 10.

interposed between each adjacent pair of lips 10 is a spacing member, of which I shall describe several forms. In Figs. 1 and 2 the spacing member shown as a section of pipe 11, and bridging the gap between each adjacent'pair of domes is a filler member which In the present instance I have shown as a netal. plate 12 resting on the horizontal ex ions 9. Bolts 13 passing through the repeetive a taxes 6 of the channels and th ough apertures in the plates 12 serve to mp the elements together. Similar pipe sections 14.- are interposed between the flanges 100*? the other two sides of each dome and the dome adjacent thereto and bolts 15 passing through said pipe sections and cooper-at ing with'said flanges serve to couple the :omes together. Filler plates 16 rest on the I norizontai. extensions of each adjacent pair of domes and run at right angles to the plates 12, the former being preferably placed under the latter as indicated in Figs. 1 and 2 so that the bolts 13 will clamp all the parts tightly together.

In "forming the mold above described the operator first ascertains the distance between the centers or" a pair of columns, determines the number or" forms necessary to span said distance and then prepares spacers such as the pipe sections 11 oi such length that the combined length of all the spacers will equal the, difference between the separation of'the columns and the combined length of the forms necessary to make up a panel. In this way the end beam-boxes may always be arranged over a column or the capitol thereof. .W hen concrete indicated at 17 has hardened the Iorms and their support-menr hers may be removed after the nuts on bolts 13 and 15 are unscrewed, or by means of the apparatus shown in my co-pending application, Serial No. 188,689 filed August 28, 1917 the forms may be removed without waiting until the concrete. has become thoroughly hardened.

In the modification shown in Fig. 5 I dis pense with the spacersfor the longitudinal beam-boxes and with the longitudinal filler plates 12 by employing a combined spacer and filler shown in the prcsent instance as an inverted channel 18. in which case a bolt 19 may be employed for clamping said channel 18 and the flanges 10 of an adjacent pair of domes together. In this case the transverse filler plates 16 must of course be employed to bridge the gaps between the other two sides of each pair of domes and form the bottom of each transverse beamox. In this case the length of the combined spacers and fillers 18 is determined in the same way as above set forth in connection with Figs. 1 to 4 inclusive.

Another device which may be used to space the domes apart is shown in Figs. 6, 7 and 8 as a spring 20 swiveled to the upper face of the channel 4 and arranged to be moved about its pivot to determine the separation between the flanges 10. 10 of a pair of adjacent domes. When this separation has been determined the operator preferably will prepare a gage such as indicated in dotted lines at 21 and placing vertical edge thereof against the flange of the channel, drive the spring member 20 about its pivot with a hammer until the end thereof touches the end of the horizontal side of the gage. In this case as before the transverse filler plates 12 are employed to bridge the gaps between each pair of adjacent domes and the bolts 13 are used to clamp the elements together. As shown in Fig. 9 a bolt 22 may be threaded through the flange 10 which preferably is reinforced by :1 metallic block '23 which may be electrically welded thereto and thereby determine the separation between a pair of adjacent domes.

Instead of using separate spacers for the portions of the domes which make up the transverse and longitudinal beam-boxes as above described I may use a single device to both. Such a device is shown in Figs. 10 and 11 as consisting of a cross having arms 24, 25 nailed or suitably fastened together. said device being placed at the juncture of four'domes and its arms lying re spectively in the two beam-boxes with one of them resting on the support-member 4.

As shown in Figs. 12 and 13 a one-piece metallic cross 26 may be used in place of the device shown in Figs. 10 and 11.

It will be readily apparent that various other modifications may be madein the apparatus above specifically described and therefore I desire it to be understood that l CIT do not limit myself thereto but having described several illustrativeembodiments of my invention what I claim and desire to secure by Letters Patent is:

1. Apparatus for constructing concrete floors, comprising in combination laterallyspaced concrete form support members, dome-shaped forms each having the lower edges of two opposite sides resting on a pair of said supportmen1bers, the lower edges of each form extending horizdntally outwardly and terminating in down-turned lips, means separating the lips of each form from the lips ofi-the forms adjacent thereto, and plates resting on the horizontal outward extensions of said lower edges and bridging the gaps between each pair of adjacent forms.

2. Apparatus for constructing concrete floors, comprising in combination laterallyspaced concrete-form support-members, dome-shaped forms each having the lower edges of two opposite sides resting on a pair of said support-members. the lower edges of each form extending horizontally outwardly and terminating in down-turned lips, means separating the lips of each form from the lips of the forms adjacent thereto, plates resting on the horizmital outward extensions oi said lower edges and bridging the aps between each pair of adjacent forms, and means clamping said plates to said horizontal extensions.

3. In an apparatus for constructing concrete floors, a concrete-form support-member having lugs projecting upwardly at intervals from its upper surface.

4. Apparatus for constructing concrete floors. comprising in combination laterallyspaeed concreteform support-members, dome-shaped concrete forms each having the lower edges of two opposite sides restingon a pair of said sup )ort-inembers, the lower edges ol each term extending horizontally outwardly and terminating indown-turned lips, spacing members resting on said supportmembers and separating the lips of each form from the lips of the forms adjacent thereto,

.a plate resting on the horizontal extensions oi said lower edges and bridging the gap between each pair ol. adjacent forms, and bolts coiiperaiing with said plate and said concrete-form support-members.

. 5. Apparatus for constructing concrete lloors. comprising in combination laterallyspaced concrete form supportmembers, dome-shaped concrete forms each hav ng the lower edges of two opposite sides resting v on a pair of said support-members, the lower edges of each form extending horizontally outwardly and terminating in down-turned lips, means separating the lips of each form from the lips of the forms adjacent thereto, and bolts cooperating with the down-turned lips of each pair of adjacent forms.

15. Apparatus for constructing concrete floors. comprising in combination laterallyspaced concrete form support members,

dome-shaped concrete forms each having the,

lower edges of two opposite side resting on a pair of said support-members, and means between each pair of adjacent forms for spacing the same and bridging the gaps therebetween.

7. Appa 'atus for constructing concrete floors, comprising in combination laterallyspaced concrete form support-members, dome-shaped concrete form each having the lower edges of two opposite sides resting on a pair of said support-me1nbers, and a cruciform member resting on a support-member at the juncture of four concrete-forms and having its arms arrangedbetween each pair of adjacent forms, respectively.

8. In an apparatus'tor constructing concrete floors. a concrete-form support-member, and a spacing-member pivotally connected to the upper surface thereof.

1). Apparatus for constructing concrete floors; comprising in combination laterallyspaced concrete-form support-members, dome-shaped concrete-fm-ms each having the lower edges of two opposite sides resting on a pair of said support-members, means for temporarily securing said edges of said forms to said support-members, the lower edges of the other two sides extending horizont-a ll v outwardly and terminating in doWn-' turned lips, said lips being spaced from the corresopnding lips of the adjacent forms, and plates rsting on the horizontal outward extensions of the lower edges of the last mentioned sides and bridging the gaps between each pair of adjacent forms.

In testimony whereof, I have hereunto subscribed my 'nan'ie this 31st day of December. 1917.

N ILS FREDERICK AMBURSEN. 

